List of Counties in Idaho

List Of Counties In Idaho

This is a list of 44 counties in the U.S. state of Idaho.

Each county in Idaho has a license plate prefix, according to the first letter of the county name. The first county for a given letter is given #1, the second county #2, etc. For example, Ada and Adams are the only two counties with the letter 'A'. Since Ada comes before Adams alphabetically, Ada is '1A' while Adams is '2A.' There are four counties that start with the letter 'L': Latah, Lemhi, Lewis, and Lincoln; the license plate prefixes for these counties are 1L, 2L, 3L, and 4L, respectively.

Elmore, Idaho, Kootenai, Nez Perce, Shoshone, Valley, and Washington counties are the only ones in the state with those beginning letters. Therefore, the license plate prefix would be the first letter of the county name, without a number. The letter 'B' has ten counties, 'C' has seven, and 'L' has four; the remaining letters have two or fewer.